Migration of plasticizer di-2-ethylhexyl phthalate from PVC film into water food simulants

In order to research and evaluate the safety of food packaging of plasticizer Di-2-ethylhexyl phthalate（DEHP）in PVC film, the migration rate of DEHP from PVC film into water food simulants (distilled water, 65% aqueous ethanol, 20% aqueous ethanol, 4% aqueous acetic acid) was studied at 17, 30, 40, 50 and 60℃ by Gas Chromatography. The results show that DEHP can migrate into all water food simulants from PVC film and the migration rate was the highest in 65% aqueous ethanol with the range 0.85%～6.31% and a big increasing amplitude when contacting temperature over 30℃, the rate was lower in 20% aqueous ethanol and distilled water with the range 0.19%～0.45% and 0.19%～0.37%, respectively; and the rate was the lowest in 4% aqueous acetic acid with the picked out rate 17% and the value ＜0.4%. Therefore, the potential safety hazard was higher when high alcoholic beverage (include other alcoholic solid food) packed by PVC film (include cling film) while lower when food with stronger acidity were concluded.